﻿using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Text; 

namespace LabelPrintSystem
{
    class ZebraPrintProcess
    {
        /*条码打印命令说明
^XA                           //条码打印指令开始
^MD30                         //设置色带颜色的深度, 取值范围从-30到30
^LH60,10                      //设置条码纸的边距
^FO20,10                      //设置条码左上角的位置
^ACN,18,10                    //设置字体
^BY1.4,3,50                   //设置条码样式。1.4是条码的缩放级别，3是条码中粗细柱的比例, 50是条码高度
^BC,,Y,N                      //打印code128的指令
^FD12345678^FS                //设置要打印的内容, ^FD是要打印的条码内容^FS表示换行
^XZ                           //条码打印指令结束
*/
        //上面的指令会打印12345678的CODE128的条码

        [System.Runtime.InteropServices.StructLayout(System.Runtime.InteropServices.LayoutKind.Sequential)]
        private struct OVERLAPPED
        {
            int Internal;
            int InternalHigh;
            int Offset;
            int OffSetHigh;
            int hEvent;
        }

        [System.Runtime.InteropServices.DllImport("kernel32.dll")]
        private static extern int CreateFile(string lpFileName, uint dwDesiredAccess, int dwShareMode, int lpSecurityAttributes, int dwCreationDisposition, int dwFlagsAndAttributes, int hTemplateFile);
        [System.Runtime.InteropServices.DllImport("kernel32.dll")]
        private static extern bool WriteFile(int hFile, byte[] lpBuffer, int nNumberOfBytesToWrite, out int lpNumberOfBytesWritten, out OVERLAPPED lpOverlapped);
        [System.Runtime.InteropServices.DllImport("kernel32.dll")]
        private static extern bool CloseHandle(int hObject);
        private static int iHandle;

        public static bool Open()
        {
            iHandle = CreateFile("LPT1:", (uint)FileAccess.ReadWrite, 0, 0, (int)FileMode.Open, 0, 0);
            if (iHandle != -1)
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        public static bool Write(string Mystring)
        {
            if (iHandle != -1)
            {
                int i;
                OVERLAPPED x;
                byte[] mybyte = System.Text.Encoding.Default.GetBytes(Mystring);
                return WriteFile(iHandle, mybyte, mybyte.Length, out i, out x);
            }
            else
            {
                throw new Exception("LPT1端口未打开!");
            }
        }
        public static bool Close()
        {
            return CloseHandle(iHandle);
        }

        [DllImport("fnthex32.dll")]
        public static extern int GETFONTHEX(
                              string BarcodeText,
                              string FontName,
                              string FileName,
                              int Orient,//方向  
                              int Height,
                              int Width,
                              int IsBold,
                              int IsItalic,
                              StringBuilder ReturnBarcodeCMD);

        /*
         * 调用打印汉字，下面代码将会打印“测试”二个汉字
            string sBarCodeCMD = ""; //条码打印命令
            StringBuilder sb1 = new StringBuilder(10240);
            int i1;
            i1 = GETFONTHEX("测试","宋体","temp1",0,30,20,0,0,sb1);
            sBarCodeCMD = sb1.ToString() + "^XA^MD30^LH20,20^FO20,20^XGtemp1,1,1^FS^XZ";
         * 
            注意红色的temp1，
            如果前面是temp1,后面就应该是temp1
            如果前面是temp2，后面就应该修改为temp2
         * 
         * 
         * StringBuilder sb1 = new StringBuilder(10240);

            如果StringBuilder的容量设置太小，可能会出错
            我在用时
            StringBuilder sb1 = new StringBuilder(1024);
            就出现过错误

            我改为
            StringBuilder sb1 = new StringBuilder(2048);
            错误就消失了
          */

    }


}
